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You already learned that the file extension is the part of the filename comin’ after the dot, an’ how ya can show it on yer own rig. Now we’re lookin’ into why knowin’ them extensions matters, an’ how to use ‘em right by yourself.

You got file extensions turned on, partner?

Take a look at one o’ yer files in that folder setup right now — you see .docx, .jpg, or somethin’ like that tacked onto the end o’ the name? If not, head back to the last part an’ get it switched on first.

File Extensions in IT and Media Production

Different majors use different file types. Here are some you’ll run into at IM:

Extension What is it? Major
.py Python script IT
.html / .css Webpage / stylesheet IT
.js JavaScript code IT
.docx Text document Both
.pdf Finished, locked document Both
.jpg / .png Image Media Production
.psd Photoshop project file Media Production
.mp4 Video file Media Production

File extensions for code, documents, images, project files and video

Workin’ File vs. Finished Product

A .psd file ain’t nothin’ like a finished .jpg – one’s the workin’ file you can still tweak on, and the other’s the final cut.

Same goes for code: a .py file’s just the source, not a ready-to-run program all by its lonesome.

A work file can be further edited, while the finished file is the delivered result

Overview of file extensions, working files and final files

Example of packing and finding files

Task - Create Properly Named Files in Your Own Folder Structure

You need to submit three files for a school project: an image, a text document, and a webpage file.

Step 1 - Create the Files

Head on over to that folder structure y’all built back at Mappestruktur Level 1, and whip up three brand-new, empty files:

  • one picture (.jpg or .png)
  • one text document (.docx)
  • one web page file (.html)

Step 2 - Give ‘em proper names

Each file needs to have:

  • a descriptive name (see [[Folder Structure Level 2 - File Names|previous part]])
  • the right file extension fer its type o’ contents
  • the correct spot in yer own folder structure

Don’t change file extensions to tryna “trick” some software

The extension oughta match what’s actually in there. Swappin’ .docx fer .html don’t turn it into a webpage – it just makes it busted fer whatever tries t’ open it up.

Step 3 - Check Your Work

Take a look at yer three files. Does the file extension show up on all three? Got names that tell ya what’s inside ‘em without havin’ to open ‘em up?

Once you’re done

Take a look at that file name IMG2093.jpg. Is it a good one for sure? What would ya name this here file instead, without touchin’ on the extension?

All Set! 🎉

You know your way around common file extensions in IT and media production now, and you can tell an workin’ file from a finished one. With those good names from last time, you got all it takes to keep yer schoolwork sorted out for the rest of the year.